Starter quiz
- A degree of accuracy shows how precise a number or ______ is. For example, to the nearest cm, to the nearest 10 or to 1 significant figure.
- 'measurement' ✓
- Match each number to the correct statement.
- 100.56⇔1 is the first significant figure ✓
- 0.569⇔5 is the first significant figure ✓
- 0.0086023⇔8 is the first significant figure ✓
- 0.00040003⇔4 is the first significant figure ✓
- 3680.0036⇔3 is the first significant figure ✓
- Round 0.0434 to 2 significant figures.
- '0.043' ✓
- Round 0.007006 to 3 significant figures.
- '0.00701' ✓
- Round 0.0896 to 2 significant figures.
- '0.090' ✓
- Round 0.00600736 to 3 significant figures.
- '0.00601' ✓
Exit quiz
- A ______ of accuracy shows how precise a number or measurement is.
- 'degree' ✓
- The average size of a secondary school in 2024 was 1050. This number is most likely to have been rounded to which degree of accuracy?
- one decimal place
- nearest integer
- nearest ten ✓
- nearest hundred
- nearest thousand
-
- The average temperature in the UK in 2024 was 10.93°C. This is most likely to have been rounded to which degree of accuracy?
- nearest ten
- nearest integer
- 1 decimal place
- 2 decimal places ✓
- 3 decimal places
-
- Match each situation to the most appropriate degree of accuracy.
- Buckets of water to fill a paddling pool⇔nearest integer ✓
- Number of pupils at a primary school⇔nearest ten ✓
- Number of people living in a village⇔nearest hundred ✓
- Height of Mount Everest in metres⇔nearest thousand ✓
- Use the exchange rate £1:6.95 into pounds. Give your answer to an appropriate degree of accuracy.
- '£5.47' ✓
- Use your calculator to evaluate . Give your answer to an appropriate degree of accuracy.
- 0.154
- 0.15
- −0.15 ✓
- −0.154
- −0.1543
-
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- When calculating often 3 significant figures is the required degree of accuracy.
- When working with integers in context different degrees of accuracy may be appropriate.
- When working with decimals in context different degrees of accuracy may be appropriate.
Common misconception
Rounding prematurely during multi-step calculations.
Encourage the use of fractions (where possible) or the use of the 'ANS' button.
Keywords
Degree of accuracy - A degree of accuracy shows how precise a number or measurement is. E.g. to the nearest cm, nearest 10, 1 s.f., etc
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